CVE-2021-4259 phpRedisAdmin login.inc.php authHttpDigest wrong operator in string comparison

Medium 5.0 Published 19 Dec 2022 Updated 3 Aug 2024

Attackers can bypass authentication in phpRedisAdmin due to a flawed string comparison in the HTTP digest login mechanism.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2021-4259?

CVE-2021-4259 is a medium-severity authentication bypass vulnerability in phpRedisAdmin, published on 19 Dec 2022. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A vulnerability was found in phpRedisAdmin up to 1.16.1. It has been classified as problematic. This affects the function authHttpDigest of the file includes/login.inc.php. The manipulation of the argument response leads to use of wrong operator in string comparison. Upgrading to version 1.16.2 is able to address this issue. The name of the patch is 31aa7661e6db6f4dffbf9a635817832a0a11c7d9. It is recommended to upgrade the affected component. The associated identifier of this vulnerability is VDB-216267.

Weakness: CWE-597

Which versions are affected by CVE-2021-4259?

It affects 1 product.

Products include Phpredisadmin Project Phpredisadmin.

How do I fix CVE-2021-4259?

No fix has been published for CVE-2021-4259 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2021-4259 being exploited?

There is no known exploitation of CVE-2021-4259 in the wild and no public exploit code.

Sources

Also known as GHSA-gmg9-6627-crjh.